Transmitting an executable binary to FPGA via Serial port

[Patrick Schmidt]

Hello,

I want to transmit a binary directly from my host system to a Chipyard prototype running on an FPGA. I wanted to ask if this is already implemented somewhere and if not what would be the best way to do this. The basic program flow should be: transmit -> measure performance -> transmit next program etc. I would also be open to using FireSim if that would be easier on there. Thanks in advance!

Kind regards,
Patrick

[Jerry Zhao]

What FPGA are you using?

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[Patrick Schmidt]

I have a VCU118 and a U280.

[Jerry Zhao]

What you are asking for is being tracked in this issue https://github.com/ucb-bar/chipyard/issues/1889 .  We currently have flows for flashing binaries onto Arty100Ts via UART, that flow needs to be brought up for the VCU118.

-Jerry

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[Patrick Schmidt]

Thanks! This seems to be it. Is there also a way to test in with the simulator before moving to the FPGA?

[Jerry Zhao]

Look at the TetheredChipLikeRocketConfig. This builds a 2-chip setup in the harness, where chip0 is the DUT, and chip1 is the BringupHostConfig (which is what should go on the FPGA). 
Running binaries on this config will load them into DRAM on chip1, and the DUT (chip0) will access memory through chip1 via serial-TL, just as the real chip.

-Jerry

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[Patrick Schmidt]

Thanks again, I will check it out! I have found the code for the UART TSI and wanted to know if there is also a C version available? I want to work with Gemmini which leads to some issues with a C++ compiler.